CN103546194A - Data transmission method and data transmission device - Google Patents

Abstract

The invention discloses a data transmission method and a data transmission device. The method includes determining a frequency domain position of a physical resource block used for sending data by means of frequency hopping, wherein the frequency domain position is determined at least according to the number of sub-bands and the number of transmission times of the data; transmitting the data on time frequency resources corresponding to the determined frequency domain position of the physical resource block. By the data transmission method and the data transmission device, frequency gain of data transmission is increased.

Description

Data transmission method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a data transmission method and apparatus.

Background

In a Long Term Evolution (LTE) system, an Orthogonal Frequency Division Multiple Access (OFDMA) technology is used in a downlink, and a Single Carrier-Frequency Division Multiple Access (SC-FDMA) technology is used in an uplink, but Inter-Cell Interference (ICI) is significantly increased because a common co-Frequency networking mode is adopted. In order to reduce ICI, LTE employs some interference-free techniques, such as Inter-Cell interference cancellation (ICIC). The Downlink ICIC technology realizes a Downlink interference pre-reminding function based on a method of Relative Narrowband Transmit Power (RNTP) limitation of an evolved Node B (eNodeB for short), and enhances the coverage performance of a Physical Downlink Shared Channel (PDSCH for short); the Uplink is based on (High Interference Indication/Overload Indication, HII/OI for short) ICIC technology, which enhances the coverage performance of Physical Uplink Shared Channel (PUSCH for short).

In addition, Channel Coding (Channel Coding) technology and Multiple Input Multiple Output (MIMO) technology have important contributions in improving link transmission performance, so that data can resist various fading of a Channel. The MIMO technology can also improve coverage performance and capacity performance of the LTE system through spatial diversity, spatial multiplexing, and beamforming technologies, and in particular, a Coordinated multipoint (CoMP) technology developed based on the MIMO technology. However, MIMO technology and CoMP technology heavily depend on measurement and feedback of channel state information, and in current and future periods of time, measurement and feedback of a terminal (User Equipment, abbreviated as UE) with a very low signal-to-noise ratio to a radio channel in a radio system are still bottlenecks. Therefore, for coverage-limited UEs, it is difficult for the closed-loop MIMO technology and CoMP technology to obtain the required gain, and the simple and practical open-loop MIMO technology is often adopted. The open-loop MIMO technology can obtain diversity gain on the basis of saving resource allocation overhead and channel feedback overhead, and meanwhile, the dependence of the open-loop technology on channel feedback is reduced, so that the open-loop MIMO technology is generally combined with a resource frequency hopping technology.

Although there are various technologies in the LTE system to improve the transmission performance, especially the coverage performance, it is found through experimental network tests and simulations that PUSCH at a medium data rate, PDSCH at a high data rate, and Voice over IP (VoIP) traffic are still channels with limited coverage performance in each channel in the LTE system. The main reasons are as follows: the limited transmit power of the UE results in limited PUSCH and VoIP for medium data rates, while ICI between base stations results in limited PDSCH for high data rates. This puts a demand on coverage performance improvement of the LTE system, and a Transmission Time Interval (TTI) Bundling (Bundling) technique is introduced for the LTE system. The TTI Bundling technology forms different redundancy versions for the whole data packet through channel coding, the different redundancy versions are respectively transmitted in a plurality of continuous TTIs, the transmission in the plurality of discontinuous TTIs is also in evaluation, and the TTI Bundling technology obtains coding gain and diversity gain by occupying more transmission resources so as to obtain higher received energy and link signal-to-noise ratio, thereby improving the coverage capability of an LTE system. Since the TTI Bundling technique is mainly used for a terminal with a very low signal-to-noise ratio by reducing spectrum efficiency in exchange for coverage performance, for a UE with a very low signal-to-noise ratio, the coverage performance can be improved by a diversity technique, for example, a frequency diversity gain is obtained by a frequency hopping technique. In the existing LTE standard technology, TTI Bundling and frequency hopping can be used simultaneously.

LTE technology supports two types of frequency hopping, type1 hopping and type2 hopping, where type1 hopping is independent of the number of subbands and type2 hopping is dependent on the number of subbands. The system can obtain more frequency diversity gain by setting the number of subbands to obtain more hopping positions, but in the LTE system, the final hopping position in Type1 hopping is only two positions, and is not always the most hopping positions.

For example, as shown in fig. 1, in the inter-subframe frequency hopping method of Type1, since two frequency hopping positions are alternately used according to the number of transmissions, positions in every 10 subframes may repeatedly occur, resulting in that subframe 0 (relative subframe number) and subframe 10 (relative subframe number) may correspond to the same physical resource block when the same logical resource is allocated. Fig. 2 is a case of the Type2 intra-subframe and inter-subframe hopping method, similar to fig. 1.

Aiming at the problem that the coverage area of data transmission is small due to low frequency diversity gain of a data transmission method in the related art, an effective solution is not provided at present.

Disclosure of Invention

The invention provides a data transmission method and a device, aiming at the problem that the coverage area of data transmission is smaller due to lower frequency diversity gain of the data transmission method in the related art, and at least solving the problem.

According to an aspect of the present invention, there is provided a data transmission method, including: determining the frequency domain position of a physical resource block for sending data in a frequency hopping mode, wherein the frequency domain position is determined at least according to the number of sub-bands and the transmission times of the data; and transmitting data on the time-frequency resource corresponding to the determined frequency domain position of the physical resource block.

Preferably, the determining the frequency domain position of the physical resource block for transmitting data by the frequency hopping method includes: and determining a first frequency domain position and a second frequency domain position of the physical resource block according to the number of the sub-bands and the transmission times of the data.

Preferably, the determining the first frequency-domain position of the physical resource block according to the number of sub-bands and the number of data transmissions comprises: determining the first frequency domain position by

$n_{\mathrm{PRB}}^{S1}\left(i\right)=\mathrm{mod}[(n_{\mathrm{VRB}}+\left(\mathrm{mod}(T_{\mathrm{Num}},N_{\mathrm{sb}})\right)*N_{\mathrm{RB}}^{\mathrm{sb}}),N_{\mathrm{RB}}^{\mathrm{PUSCH}}]$

Wherein i is the sub-frame number, n_VRBGranting a location for a resource, N_sbIs the sub-band number,is the number of RBs in one sub-band,number of uplink resource blocks used for frequency hopping:

is biased for frequency hopping, if

Is an odd number of the components,

otherwise

n_VRBBy resource scheduling grant assignment, N_sbAnd

configured through RRC layer signaling.

Preferably, the determining the second frequency domain position of the physical resource block according to the number of the sub-bands and the number of data transmissions includes:

determining the second frequency domain position by

${{\mathrm{<figure-callout\; label="n\; s"\; filenames="HDA00001872315800011.png,HDA00001872315800012.png"\; state="\{\{state\}\}">n</figure-callout>}}^s}_{\mathrm{PRB}}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2,$Wherein,

determined according to one of the following equations:

satisfies the following conditions:$n_{\mathrm{PRB}}^{S1}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}^{S1}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2,$i is the subframe number.

Preferably, when the resource scheduling grant is a distributed resource block; and a first time slot and a second time slot in the subframe i respectively occupy the first frequency domain position and the second frequency domain position.

When the resource scheduling grants centralized resource blocks; and when the subframe i is an even number, occupying the first frequency domain position according to the sending times, and when the subframe i is an odd number, occupying the second frequency domain position according to the sending times.

Preferably, the number of resource blocks within said sub-band

Determined by the following formula:

according to another aspect of the present invention, there is provided a data transmission apparatus including: a first determining module, configured to determine a frequency domain position of a physical resource block used for sending data in a frequency hopping manner, where the frequency domain position is determined according to at least the number of subbands and the number of data transmissions; and the transmission module is used for transmitting data on the time-frequency resource corresponding to the determined frequency domain position of the physical resource block.

Preferably, the first determining module is configured to determine the first frequency domain position and the second frequency domain position of the physical resource block according to the number of sub-bands and the number of data transmissions.

Preferably, the first determining module comprises: a second determining module for determining a first frequency domain location of the physical resource block by the following formula

$n_{\mathrm{PRB}}^{S1}\left(i\right)=\mathrm{mod}[(n_{\mathrm{VRB}}+\left(\mathrm{mod}(T_{\mathrm{Num}},N_{\mathrm{sb}})\right)*N_{\mathrm{RB}}^{\mathrm{sb}}),N_{\mathrm{RB}}^{\mathrm{PUSCH}}]$

Wherein n is_VRBFor resource grant position, specified by resource scheduling grant, N_sbIs the sub-band number,

is the number of RBs in one sub-band,number of uplink resource blocks used for frequency hopping:$N_{\mathrm{RB}}^{\mathrm{PUSCH}}=N_{\mathrm{RB}}^{\mathrm{UL}}-{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}-\left(N_{\mathrm{RB}}^{\mathrm{UL}}\mathrm{mod}2\right),$is biased for frequency hopping, if

Is an odd number of the components,

otherwise

n_VRBBy resource scheduling grant assignment, N_sbAnd

configured through RRC layer signaling.

Preferably, the first determining module comprises: a third determining module, configured to determine a second frequency domain position n of the physical resource block by the following formula^s2_PRB(i)：

${{\mathrm{<figure-callout\; label="n\; s"\; filenames="HDA00001872315800011.png,HDA00001872315800012.png"\; state="\{\{state\}\}">n</figure-callout>}}^s}_{\mathrm{PRB}}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2,$Wherein,determined according to one of the following equations:

satisfies the following conditions:$n_{\mathrm{PRB}}^{S1}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}^{S1}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2.$

preferably, when the resource scheduling grant is a distributed resource block; and a first time slot and a second time slot in the subframe i respectively occupy the first frequency domain position and the second frequency domain position.

When the resource scheduling grants centralized resource blocks; and when the subframe i is an even number, occupying the first frequency domain position according to the sending times, and when the subframe i is an odd number, occupying the second frequency domain position according to the sending times.

Preferably, the number of resource blocks within said sub-bandDetermined by the following formula:

according to the invention, the frequency domain position is determined at least according to the number of the sub-bands and the transmission times of the data, and the data is transmitted on the time-frequency resource corresponding to the frequency domain position, so that the frequency hopping position is increased, and the problem that the coverage range of data transmission is smaller due to lower frequency diversity gain in a transmission time interval bundling technology in the related technology is solved, thereby improving the frequency diversity gain of the data and further improving the coverage range of the data transmission.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic view of inter-subframe resource hopping of type1 according to the related art;

fig. 2 is a diagram of inter-subframe and intra-subframe resource hopping of type1 according to the related art;

FIG. 3 is a flow chart of a method of data transmission according to an embodiment of the present invention;

fig. 4 is a block diagram of a data transmission apparatus according to an embodiment of the present invention;

fig. 5 is a block diagram of a preferred configuration of a data transmission apparatus according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of inter-subframe resource hopping of type1 according to an embodiment of the present invention;

FIG. 7 is a diagram illustrating enhanced type1 inter-and intra-sub-frame resource hopping according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of resource hopping between subframes of enhanced type1 under TTI Bundling according to an embodiment of the present invention; and

fig. 9 is a diagram illustrating enhanced type1 inter-and intra-sub-frame resource hopping according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The present embodiment provides a data transmission method, and fig. 3 is a flowchart of a data transmission method according to an embodiment of the present invention, and as shown in fig. 3, the method includes the following steps S302 and S304.

Step S302: and determining the frequency domain position of a physical resource block for transmitting data in a frequency hopping mode, wherein the frequency domain position is determined at least according to the number of sub-bands and the transmission times of the data.

Step S304: and transmitting data on the time-frequency resource corresponding to the determined frequency domain position of the physical resource block.

Through the steps, the frequency domain position is determined at least according to the number of the sub-bands and the transmission times of the data, and the data is transmitted on the time-frequency resource corresponding to the frequency domain position, so that the frequency hopping position is increased, the problem that the coverage range of data transmission is small due to low frequency diversity gain in a transmission time interval bundling technology in the related technology is solved, the frequency diversity gain of the data is improved, and the coverage range of the data transmission is further improved.

In implementation, in order to improve accuracy of determining the frequency domain position, the first frequency domain position and the second frequency domain position of the physical resource block may be determined according to the number of sub-bands and the number of data transmissions.

As a preferred embodiment, the first frequency domain position may be determined by the following formula

$n_{\mathrm{PRB}}^{S1}\left(i\right)=\mathrm{mod}[(n_{\mathrm{VRB}}+\left(\mathrm{mod}(T_{\mathrm{Num}},N_{\mathrm{sb}})\right)*N_{\mathrm{RB}}^{\mathrm{sb}}),N_{\mathrm{RB}}^{\mathrm{PUSCH}}]$

Wherein n is_VRBFor resource grant position, specified by resource scheduling grant, N_sbIs the sub-band number,

is the number of RBs in one sub-band,

number of uplink resource blocks used for frequency hopping:$N_{\mathrm{RB}}^{\mathrm{PUSCH}}=N_{\mathrm{RB}}^{\mathrm{UL}}-{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}-\left(N_{\mathrm{RB}}^{\mathrm{UL}}\mathrm{mod}2\right),$

is biased for frequency hopping, if

Is an odd number of the components,

otherwise

n_VRBBy resource scheduling grant assignment, N_sbAnd

configured through RRC layer signaling.

As a preferred embodiment, the second frequency domain position may be determined by the following formula

${n^{s2}}_{\mathrm{PRB}}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2,$Wherein,

determined according to one of the following equations:

satisfies the following conditions:$n_{\mathrm{PRB}}^{S1}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}^{S1}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2.$

preferably, when the resource scheduling grants distributed resource blocks, the first time slot and the second time slot in the subframe i occupy the first frequency domain position and the second frequency domain position, respectively.

And when the resource scheduling grants the centralized resource block, occupying the first frequency domain position according to the sending times when the subframe i is an even number, and occupying the second frequency domain position according to the sending times when the subframe i is an odd number.

As a preferred embodiment, the number of resource blocks in a sub-bandDetermined by the following formula:

it should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.

In another embodiment, a data transmission software is further provided, and the software is used for executing the technical solutions described in the above embodiments and the preferred embodiments.

In another embodiment, a storage medium is provided, in which the data transmission software is stored, and the storage medium includes but is not limited to: optical disks, floppy disks, hard disks, erasable memory, etc.

The embodiment of the present invention further provides a data transmission device, which can be used to implement the data transmission method and the preferred embodiment, and has been described above, and is not described again, and the modules involved in the data transmission device are described below. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the systems and methods described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.

Fig. 4 is a block diagram of a data transmission apparatus according to an embodiment of the present invention, as shown in fig. 4, the apparatus including: the first determination module 42 and the transmission module 44 are described in detail below.

A first determining module 42, configured to determine a frequency domain position of a physical resource block used for sending data in a frequency hopping manner, where the frequency domain position is determined according to at least the number of subbands and the number of data transmissions; and a transmission module 44, connected to the first determining module 42, configured to transmit data on the time-frequency resource corresponding to the frequency-domain position of the physical resource block determined by the first determining module 42.

Preferably, the first determining module 42 is configured to determine the first frequency domain position and the second frequency domain position of the physical resource block according to the number of sub-bands and the number of data transmissions.

Fig. 5 is a block diagram of a preferred structure of a data transmission apparatus according to an embodiment of the present invention, and as shown in fig. 5, the first determining module 42 includes: the second determining module 422 and the third determining module 424, which are described in detail below.

The first determination module 42 includes: a second determining module 422, configured to determine the first frequency domain location of the physical resource block by the following formula

$n_{\mathrm{PRB}}^{S1}\left(i\right)=\mathrm{mod}[(n_{\mathrm{VRB}}+\left(\mathrm{mod}(T_{\mathrm{Num}},N_{\mathrm{sb}})\right)*N_{\mathrm{RB}}^{\mathrm{sb}}),N_{\mathrm{RB}}^{\mathrm{PUSCH}}];$

Wherein n is_VRBFor resource grant position, specified by resource scheduling grant, N_sbIs the sub-band number,

is the number of RBs in one sub-band,

number of uplink resource blocks used for frequency hopping:$N_{\mathrm{RB}}^{\mathrm{PUSCH}}=N_{\mathrm{RB}}^{\mathrm{UL}}-{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}-\left(N_{\mathrm{RB}}^{\mathrm{UL}}\mathrm{mod}2\right),$

is biased for frequency hopping, if

Is an odd number of the components,

otherwise

n_VRBBy resource scheduling grant assignment, N_sbAndconfigured through RRC layer signaling.

The first determining module includes: a third determining module 424, configured to determine the second frequency domain position n of the physical resource block by the following formula^s2_PRB(i)：

${n^{s2}}_{\mathrm{PRB}}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2,$Wherein,

determined according to one of the following equations:

satisfies the following conditions:$n_{\mathrm{PRB}}^{S1}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}^{S1}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2.$

preferably, the number of resource blocks within a sub-band

Determined by the following formula:

reference will now be made in detail to the preferred embodiments, which are a combination of the above embodiments and preferred embodiments.

Preferred embodiment 1

In this preferred embodiment, a sending end determines a frequency domain position of a physical resource block used for sending data through frequency hopping, and the frequency domain position is determined at least according to the number of sub-bands and the number of data transmissions.

In the preferred embodiment, the first frequency domain location of the physical resource block is determined according to the following:

or,$n_{\mathrm{PRB}}^{S1}\left(i\right)=\mathrm{mod}[(n_{\mathrm{VRB}}+\left(\mathrm{mod}(T_{\mathrm{Num}},N_{\mathrm{sb}})\right)*N_{\mathrm{RB}}^{\mathrm{sb}}),N_{\mathrm{RB}}^{\mathrm{PUSCH}}].$

wherein n is_VRBFor resource grant position, specified by resource scheduling grant, N_sbIs the sub-band number,

is the number of RBs in one sub-band,

number of uplink resource blocks used for frequency hopping:$N_{\mathrm{RB}}^{\mathrm{PUSCH}}=N_{\mathrm{RB}}^{\mathrm{UL}}-{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}-\left(N_{\mathrm{RB}}^{\mathrm{UL}}\mathrm{mod}2\right),$wherein,

is biased for frequency hopping, if

Is an odd number of the components,

otherwise${\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}=N_{\mathrm{RB}}^{\mathrm{HO}}.$

Preferably, n_VRBBy resource scheduling grant assignment, N_sbAnd

configured through RRC layer signaling.

In the preferred embodiment, the second frequency domain position of the physical resource block is determined according to the following formula:$n_{\mathrm{PRB}}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2;$

wherein,

determined according to one of the following equations:

satisfies the following conditions:$n_{\mathrm{PRB}}^{S1}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}^{S1}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2.$

number of resource blocks within a sub-band

Is determined by the following formula:

preferred embodiment two

The preferred embodiment provides a data transmission method, as shown in fig. 1,subframe 0,subframe 8, andsubframe 16 are resource locations occupied by first transmission and retransmission of data, when frequency hopping is performed between subframes of type1, only two frequency hopping locations are used, and the two frequency hopping locations are used alternately according to the transmission times, obviously, the resource location during second retransmission is the same as that of first transmission, and if there is third retransmission, it will use the resource location of first retransmission.

When the enhanced inter-subframe hopping of type1 is employed, as shown in fig. 6, the number of hopping positions can be increased by setting the number of subbands. Different frequency hopping positions may be used for different numbers of transmissions.

In the preferred embodiment, the hopping position is determined by equation 1:

$n_{\mathrm{PRB}}^{S1}\left(i\right)={\mathrm{<figure-callout\; label="n\; VRB\; equation"\; filenames="HDA00001872315800011.png,HDA00001872315800012.png"\; state="\{\{state\}\}">n</figure-callout>}}_{\mathrm{VRB}}$equation 1

The frequency hopping position within the first transmitted subframe is determined according toequation 1.

The hop position determined by equation 2:

$n_{\mathrm{PRB}}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2$equation 1

Preferably, the first and second electrodes are formed of a metal,

determined according to one of the following equations:

satisfies the following conditions:$n_{\mathrm{PRB}}^{S1}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}^{S1}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2.$

in the preferred embodiment, the hopping position varies with the number of transmissions at a particular number of subbands. And the retransmission determines the frequency hopping position in the retransmitted subframe according to the retransmission times and the subband setting.

Specifically, the method comprises the following steps:$N_{\mathrm{RB}}^{\mathrm{UL}}=50;$N_sb=1；$N_{\mathrm{RB}}^{\mathrm{HO}}=2.$

due to thefact thatOnly 1 sub-band, if the UL Grant indicates n_VRB=[2]Physical resource block n_PRBComprises the following steps: [1]Or [13 ]]. Wherein even transmission times occupy [1 ]]Occupation in odd transmission times [13 ]]。

If it is$N_{\mathrm{RB}}^{\mathrm{UL}}=50;$N_sb=2；$N_{\mathrm{RB}}^{\mathrm{HO}}=2.$

Since there are 2 subbands, if the UL Grant indicates n_VRB=[2]Physical resource block n_PRBComprises the following steps: [1]Or [13 ]]Or [24]Or [37 ]]. During transmission, the subframe corresponding to the first transmission may occupyposition 1, the subframe corresponding to the second transmission may occupy resource block 24, the subframe corresponding to the third transmission may occupyposition 13, and the subframe corresponding to the fourth transmission may occupy resource block 37.

In the preferred embodiment, the frequency diversity gain can be increased due to the increased frequency hopping positions.

Preferred embodiment three

The second preferred embodiment has the same conditions as the second preferred embodiment, but the difference is that the hopping position of the first Slot in the first transmitted or retransmitted subframe is determined according to formula 3:

$n_{\mathrm{PRB}}^{S1}\left(i\right)=\mathrm{mod}[(n_{\mathrm{VRB}}+\left(\mathrm{mod}(T_{\mathrm{Num}},N_{\mathrm{sb}})\right)*N_{\mathrm{RB}}^{\mathrm{sb}}),N_{\mathrm{RB}}^{\mathrm{PUSCH}}]$equation 3

It should be noted that the frequency hopping position of the first Slot in the first transmission or retransmission subframe varies with the number of transmission times under a specific number of subbands.

The hopping position of the second Slot in the first transmitted or retransmitted subframe is the same as in the preferred embodiment.

As shown in particular in fig. 6.

Preferred embodiment four

The conditions of the preferred embodiment are the same as those of the second embodiment, except that in the TTI Bundling scenario, the first transmission and the retransmission both occupy multiple TTIs, for example, 4 TTIs. Since fig. 7 is inter-subframe frequency hopping, the frequency domain position of 4 subframes occupied by the first transmission can be determined byformula 1. And the frequency domain position of the occupied 4 subframes of the retransmission can be determined according toequation 2 in the preferred implementation two.

Example four

The preferred embodiment is similar to the second preferred embodiment, but the difference is that in the TTI Bundling scenario, the first transmission and the retransmission both occupy multiple TTIs, for example, 4 TTIs. Since fig. 9 is intra-subframe and inter-subframe frequency hopping, the frequency domain position within the first Slot of the 4 subframes occupied by the first transmission or retransmission can be determined byequation 3. While the frequency domain position within the first Slot of the 4 subframes occupied by the first transmission or retransmission may be implemented according to the preferred implementation three.

By the embodiment, the frequency domain position is determined at least according to the number of the sub-bands and the transmission times of the data, and the data is transmitted on the time-frequency resource corresponding to the frequency domain position, so that the frequency hopping position is increased, the problem that the coverage range of data transmission is small due to low frequency diversity gain in a transmission time interval Bundling technology in the related technology is solved, the frequency diversity gain of the data in a TTI Bundling transmission mode is improved, the coverage range of the data transmission is further improved, and the control overhead is not increased. It should be noted that these technical effects are not possessed by all the embodiments described above, and some technical effects are obtained only by some preferred embodiments.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, or they may be separately fabricated into various integrated circuit modules, or multiple modules or steps thereof may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A method of data transmission, comprising:

determining the frequency domain position of a physical resource block for sending data in a frequency hopping mode, wherein the frequency domain position is determined at least according to the number of sub-bands and the transmission times of the data;

and transmitting data on the time-frequency resource corresponding to the determined frequency domain position of the physical resource block.

2. The method of claim 1, wherein determining the frequency domain location of the physical resource block for transmitting data by frequency hopping comprises:

and determining a first frequency domain position and a second frequency domain position of the physical resource block according to the number of the sub-bands and the transmission times of the data.

3. The method of claim 2, wherein determining the first frequency-domain location of the physical resource block according to the number of subbands and the number of transmissions of data comprises:

determining the first frequency domain position by

$n_{\mathrm{PRB}}^{S1}\left(i\right)=\mathrm{mod}[(n_{\mathrm{VRB}}+\left(\mathrm{mod}(T_{\mathrm{Num}},N_{\mathrm{sb}})\right)*N_{\mathrm{RB}}^{\mathrm{sb}}),N_{\mathrm{RB}}^{\mathrm{PUSCH}}]$

Wherein i is the sub-frame number, n_VRBGranting a location for a resource, N_sbIs the sub-band number,

is the number of RBs in one sub-band,

number of uplink resource blocks used for frequency hopping:$N_{\mathrm{RB}}^{\mathrm{PUSCH}}=N_{\mathrm{RB}}^{\mathrm{UL}}-{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}-\left(N_{\mathrm{RB}}^{\mathrm{UL}}\mathrm{mod}2\right),$

is biased for frequency hopping, ifIs an odd number of the components,

otherwise

n_VRBBy resource scheduling grant assignment, N_sbAnd

configured through RRC layer signaling.

4. The method of claim 2, wherein determining the second frequency-domain location of the physical resource block according to the number of subbands and the number of transmissions of data comprises:

determining the second frequency domain position n by the following formula^s2_PRB(i)：

${n^{s2}}_{\mathrm{PRB}}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2,$Wherein,

determined according to one of the following equations:

satisfies the following conditions:$n_{\mathrm{PRB}}^{S1}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}^{S1}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2,$i is the subframe number.

5. The method according to claim 3 or 4, characterized in that:

when the resource scheduling grants distributed resource blocks; and a first time slot and a second time slot in the subframe i respectively occupy the first frequency domain position and the second frequency domain position.

When the resource scheduling grants centralized resource blocks; and when the subframe i is an even number, occupying the first frequency domain position according to the sending times, and when the subframe i is an odd number, occupying the second frequency domain position according to the sending times.

6. Method according to claim 3 or 4, characterized in that the number of resource blocks within the sub-band is determined by the number of resource blocks within the sub-band

Determined by the following formula:

7. a data transmission apparatus, comprising:

a first determining module, configured to determine a frequency domain position of a physical resource block used for sending data in a frequency hopping manner, where the frequency domain position is determined according to at least the number of subbands and the number of data transmissions;

and the transmission module is used for transmitting data on the time-frequency resource corresponding to the determined frequency domain position of the physical resource block.

8. The apparatus of claim 7, wherein the first determining module is configured to determine the first frequency-domain location and the second frequency-domain location of the physical resource block according to the number of subbands and a number of transmissions of data.

9. The apparatus of claim 8, wherein the first determining module comprises: a second determining module for determining a first frequency domain location of the physical resource block by the following formula

$n_{\mathrm{PRB}}^{S1}\left(i\right)=\mathrm{mod}[(n_{\mathrm{VRB}}+\left(\mathrm{mod}(T_{\mathrm{Num}},N_{\mathrm{sb}})\right)*N_{\mathrm{RB}}^{\mathrm{sb}}),N_{\mathrm{RB}}^{\mathrm{PUSCH}}]$

Wherein n is_VRBFor resource grant position, specified by resource scheduling grant, N_sbIs the sub-band number,

is the number of RBs in one sub-band,

number of uplink resource blocks used for frequency hopping:$N_{\mathrm{RB}}^{\mathrm{PUSCH}}=N_{\mathrm{RB}}^{\mathrm{UL}}-{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}-\left(N_{\mathrm{RB}}^{\mathrm{UL}}\mathrm{mod}2\right),$

is biased for frequency hopping, if

Is an odd number of the components,

otherwisen_VRBBy resource scheduling grant assignment, N_sbAndconfigured through RRC layer signaling.

10. The apparatus of claim 8, wherein the first determining module comprises: a third determining module, configured to determine a second frequency domain position n of the physical resource block by the following formula^s2_PRB(i)：

${n^{s2}}_{\mathrm{PRB}}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2,$Wherein,

determined according to one of the following equations:

satisfies the following conditions:$n_{\mathrm{PRB}}^{S1}\left(i\right)={\tilde{n}}_{\mathrm{PRB}}^{S1}\left(i\right)+{\tilde{N}}_{\mathrm{RB}}^{\mathrm{HO}}/2.$

11. the apparatus of claim 9 or 10, wherein:

when the resource scheduling grants distributed resource blocks; and a first time slot and a second time slot in the subframe i respectively occupy the first frequency domain position and the second frequency domain position.

When the resource scheduling grants centralized resource blocks; and when the subframe i is an even number, occupying the first frequency domain position according to the sending times, and when the subframe i is an odd number, occupying the second frequency domain position according to the sending times.

12. The apparatus of claim 9 or 10, wherein the number of resource blocks in the sub-band is equal to or greater than the number of resource blocks in the sub-band

Determined by the following formula:

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